John Deere O-Ring 13/16″ ORFS – T77857

Key Features

• 13/16" ORFS compatibility — specifically engineered for 13/16" O‑Ring Face Seal hydraulic fittings to ensure a proper seal on high‑pressure connections.
• Genuine OEM seal — manufactured to John Deere original equipment specifications for dependable performance.
• Durable elastomer construction — resists heat, pressure, and exposure to hydraulic fluids common in agricultural and industrial equipment.
• Leak‑resistant design — helps maintain a fluid‑tight connection in demanding hydraulic circuits, reducing fluid loss and contamination risk.
• Quick replacement — designed for efficient service when replacing hydraulic fittings, hoses, or components to restore sealing integrity.
• Ideal for replacement sealing — suitable for tractors, loaders, and implements that use 13/16" ORFS fittings, including connections involving high‑pressure pumps, valves, cylinders, and control blocks.

Product Details

• Product Type: O‑Ring / sealing gasket
• Part Number: T77857
• Size / Standard: 13/16" ORFS (O‑Ring Face Seal)
• Material: Elastomer suited for hydraulic applications
• Application: Provides a fluid‑tight seal in high‑pressure hydraulic connections
• Function: Prevents fluid leaks and maintains reliable hydraulic performance
• OEM Compliance: Meets John Deere original equipment specifications

Compatibility

• Systems with 13/16" ORFS connections across hydraulic hose and fittings
• High‑pressure hydraulic pump outlets
• Control valves and spools with ORFS seal faces
• Cylinders and actuators requiring ORFS face seals
• Transmission‑related hydraulic circuits using ORFS fittings
• Note: Exact fitment varies by machine model, system design, and production year — verify compatibility with the machine’s parts manual or official dealer lookup